A split quaternion nonlinear adaptive filter. - Bukhari Che Ujang; Clive Cheong Took; Aleksandar Kavcic; Danilo P. Mandic (ICASSP, 2009)

Identification of improper processes by variable tap-length complex-valued adaptive filters. - Bukhari Che Ujang; Clive Cheong Took; Danilo P. Mandic (IJCNN, 2010)

Split quaternion nonlinear adaptive filtering. - Bukhari Che Ujang; Clive Cheong Took; Danilo P. Mandic (Neural Networks, 2010)

Quaternion-Valued Nonlinear Adaptive Filtering. - Bukhari Che Ujang; Clive Cheong Took; Danilo P. Mandic (IEEE Trans. Neural Networks, 2011)

On quaternion analyticity: Enabling quaternion-valued nonlinear adaptive filtering. - Bukhari Che Ujang; Clive Cheong Took; Danilo P. Mandic (ICASSP, 2012)

Adaptive Convex Combination Approach for the Identification of Improper Quaternion Processes. - Bukhari Che Ujang; Cyrus Jahanchahi; Clive Cheong Took; Danilo P. Mandic (IEEE Trans. Neural Networks Learn. Syst., 2014)

Modeling of widely-linear quaternion valued systems using hypercomplex algorithms. - Haydar Imad Mohammed; Fazirulhisyam Hashim; Bukhari Che Ujang (ASCC, 2015)